Installation of the Core Compartment Temperature (CCT) Sensor [CFML]

TASK 77-22-05-400-801-A
Installation of the Core Compartment Temperature (CCT) Sensor

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 400
FIN: 4910KS

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	PLIERS - JAWED, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )
No specific	Torque wrench: range to between 67 and 57 lbf.in (0.76 and 0.64 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-802-A	FADEC Test (Menu Mode)
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Core Compartment Temperature (CCT) Sensor

3. Job Set-up
Subtask 77-22-05-941-051-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 77-22-05-010-052-A

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

Subtask 77-22-05-040-051-A

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 77-22-05-010-053-A

D. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

4. Procedure
Subtask 77-22-05-420-050-A

A. Installation of the Core Compartment Temperature (CCT) Sensor

CAUTION: YOU MUST DO ALL THE STEPS IN THE CORRECT SEQUENCE. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE CORE-COMPARTMENT TEMPERATURE SENSOR CABLE CAN OCCUR.

(1) Remove all the COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Apply engine oil (Material No.CP2442) to the threads of the two bolts (2), the bolt (5) and the two bolts (6).
(3) Put the Core Compartment Temperature (CCT) sensor (1) in position as follows:

CAUTION: MAKE SURE THAT THE CONNECTOR SOCKET IS IN THE CENTER OF THE SUPPORT BRACKET CUTOUT. IF IT IS NOT, DAMAGE TO THE CORE- COMPARTMENT TEMPERATURE SENSOR CABLE CAN OCCUR.

(a) Install the two bolts (6) that attach the Core Compartment Temperature (CCT) sensor (1) to the support bracket (7). Do not tighten them.
(b) Put the Core Compartment Temperature (CCT) sensor (1) in position between the support bracket (3) and the support bracket (7).
(4) Install the two bolts (2) that attach the Core Compartment Temperature (CCT) sensor (1) to the support bracket (3). Do not tighten them.
(5) Install the bolt (5) that attaches the Core Compartment Temperature (CCT) sensor (1) and the loop clamp (8) to the support bracket (9). Do not tighten them.
(6) TORQUE the two bolts (2) to between 67 and 57 lbf.in (0.76 and 0.64 m.daN )

.
(7) TORQUE the two bolts (6) to between 67 and 57 lbf.in (0.76 and 0.64 m.daN )

.
(8) TORQUE the bolt (5) to between 38 and 32 lbf.in (0.43 and 0.36 m.daN )

.
(9) Connect the electrical connector (4) to the Core Compartment Temperature (CCT) sensor (1) (Ref. AMM TASK 70-70-00-910-804). Use PLIERS - JAWED, SOFT only if necessary.

5. Close-up
Subtask 77-22-05-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 77-22-05-440-050-A

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 77-22-05-710-050-A

C. Test(s)
(1) Do the FADEC test (menu mode) (Ref. AMM TASK 73-29-00-710-802).

Subtask 77-22-05-410-051-A

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:37:55 UTC